loading...| Preferred Name |
Microdontia |
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| Synonyms |
Hypotrophic tooth Decreased size of tooth Underdeveloped tooth Small teeth Small tooth Decreased width of tooth Tooth hypoplasia Tooth hypotrophy |
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| Definitions |
Decreased size of the teeth, which can be defined as a mesiodistal tooth diameter (width) more than 2 SD below mean. Alternatively, an apparently decreased maximum width of tooth. Standard reference has means and standard deviations by gender [Moyers et al, 1976]. It is easy to measure the width of teeth, for which reason the definition of microdontia can be made with reference to the width of the tooth. However, microdontia means that the overall size of the tooth is decreased. In microdontia, the gaps between the teeth, particularly the anterior upper and lower teeth, are increased, creating diastemata. This should be assessed and coded separately. |
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| ID |
http://purl.obolibrary.org/obo/HP_0000691 |
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| comment |
Standard reference has means and standard deviations by gender [Moyers et al, 1976]. It is easy to measure the width of teeth, for which reason the definition of microdontia can be made with reference to the width of the tooth. However, microdontia means that the overall size of the tooth is decreased. In microdontia, the gaps between the teeth, particularly the anterior upper and lower teeth, are increased, creating diastemata. This should be assessed and coded separately. |
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| database_cross_reference |
SNOMEDCT_US:32337007 UMLS:C4280611 UMLS:C4280612 UMLS:C0240340 |
|
| definition |
Decreased size of the teeth, which can be defined as a mesiodistal tooth diameter (width) more than 2 SD below mean. Alternatively, an apparently decreased maximum width of tooth. |
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| has_broad_synonym |
Hypotrophic tooth |
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| has_exact_synonym |
Decreased size of tooth Underdeveloped tooth Small teeth Small tooth Decreased width of tooth Tooth hypoplasia Tooth hypotrophy |
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| id |
HP:0000691 |
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| inSubset | ||
| label |
Microdontia |
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| notation |
HP:0000691 |
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| prefLabel |
Microdontia |
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| subClassOf |